Raymond c



(No Model.)

, R. G. PENFIELD.

' AUGER FOR BRICK MACHINES.

No. 508,337. Patented Nov. 7,1893.

UNITED STATES PATENT GFFIclE.

RAYMOND c. PENFIELD, or WILLOUGHBY, OHIO, ASSIGNOR 'ro J. w.

PENFIELD & SON,

or SAME PLACE.

AUGER FOR BYRICKLMACHIINES. I

SPECIFICATION forming part of Letters Patent N6. 508,337, dated November7,1893.

Applieationfiled June 6. 1893.

are provided on the back or rearward faces and near the peripherythereof with reinforcing ribs to render the auger blades more durable.

The accompanying drawing is a side elevation of an auger embodying myinvention.

A represents the hub of the auger and B B the blades thereof. The hub isusually conical or conoidal and is cast integral with the bladesthereof, .the latter trending spirally around the hub as shown. As isWell known this Variety of anger operates in a pugging box and forcesthe material out through the die, all of which is too well known torequire illustration or further description.

In operating the auger the pressure of the auger blades on the materialis very great, and the sliding of the blades on the material, togetherwith the sharp gritty character ofthe material wrought upon causesexcessive wear on the auger blades, by reason of which such auger bladesare short lived. Such wear of course comes on the front face of theblades and the most of the wear accrues at and near Serial No. 476,795.(No model.)

constructed with ribs on the front face of the blades at the peripherythereof to increase the wearing capacity of these blades, but these ribsdecrease the working capacity of the auger, for the reason that theseribs were not effective in forcing the material toward the dies, but tothe extent thereof they lessened or covered up that much of the workingarea of the blades, and that too where the blades were most effectivetowit, at and near the periphery of the blades. As an improvement Iprovide the auger blades with reinforcing ribs at and near the peripheryof theblades, but these ribs are located on the back or rearward facesof the blades, as at b b where these ribs or reinforcements do notinterfere with the working capacity of the blades, but materiallyincrease the wearing capacity thereof.

What I claim is- An auger for a brick machine the spiral blades whereofare provided with reinforcing ribs located at or near the periphery ofthe blades on the back or rearward faces thereof substantially asdescribed.

In testimony whereof I sign this specification, in the presence of twowitnesses, this 27th day of May, 1893.

RAYMOND C. PENFIELD.

Witnesses:

WILLIAM W. WALLACE, OHAs. HORTON.

